本文關(guān)鍵詞：滲濾液超臨界水氣化制氫技術(shù)研究　出處：《中原工學(xué)院》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 滲濾液 超臨界水 制氫 反應(yīng)機理 動力學(xué)

【摘要】：隨著地球化石能源的日益枯竭和環(huán)境的不斷惡化,人們急需找到一種新型無污染的能源作為化石燃料的替代品,而氫能因其絕對無污染的燃燒特性備受人們關(guān)注,于是各種制氫工藝應(yīng)運而生。一般制氫工藝或資源浪費嚴重,或產(chǎn)氫速率較低得不到大規(guī)模推廣,而超臨界水氣化制氫工藝因具有反應(yīng)快、氣化率高、過程清潔等優(yōu)勢逐漸進入人們的視野。作為一種環(huán)境友好型,資源節(jié)約型的新型制氫技術(shù),超臨界水氣化制氫具有優(yōu)良的開發(fā)前景�；诋�(dāng)前國際上超臨界水制氫的最新研究成果,本文就滲濾液超臨界水氣化制氫技術(shù)的研究現(xiàn)狀進行了討論,指出現(xiàn)階段超臨界水氣化制氫面臨的主要技術(shù)難題和可能的解決途徑。本文以生活垃圾填埋場滲濾液為研究對象,在超臨界水中進行氣化制氫研究,詳細討論了反應(yīng)溫度、壓力和停留時間對反應(yīng)結(jié)果的影響,以制取氫氣為目的,考察不同反應(yīng)條件對氣化氣相產(chǎn)物中氫氣、甲烷、二氧化碳體積組分和產(chǎn)率,以及滲濾液COD和TOC去除率的影響。通過氣-質(zhì)聯(lián)用的方法對滲濾液原液和反應(yīng)后液相產(chǎn)物中有機物的組成進行定性定量分析,初步探討滲濾液超臨界水氣化制氫過程的化學(xué)反應(yīng)機理,采用單因素分析與正交試驗相結(jié)合的方法,得出滲濾液在超臨界水中氣化制取氫氣的最佳反應(yīng)條件是溫度450℃、壓力27MPa、停留時間10min。采用SPSS數(shù)據(jù)處理軟件對正交試驗方案的試驗結(jié)果進行方差分析,進而得到各個反應(yīng)條件對超臨界水氣化制氫影響的顯著性水平,顯著性關(guān)系由大到小是溫度停留時間壓力,即溫度對氫氣產(chǎn)量的影響最大,而壓力的影響最小。根據(jù)以上各自變量與因變量之間的顯著性關(guān)系,該模型的相關(guān)性較好,也即是非客觀因素對實驗結(jié)果影響的影響較小。針對以上因素之間的相關(guān)性,本文采用一種應(yīng)用廣泛的冪指數(shù)模型來表示氫氣的產(chǎn)率,利用Origin和1stOpt軟件通過多參數(shù)的擬合求得氫氣和二氧化碳的動力學(xué)反應(yīng)活化能分別為229-1kJ?mol和197-1kJ?mol,指前因子分別為2.04-1S和4.5E12-1S,并根據(jù)不同溫度、壓力下的反應(yīng)級數(shù)a和常數(shù)k建立了垃圾滲濾液超臨界制氫的化學(xué)反應(yīng)動力學(xué)模型。
[Abstract]:With the depletion of fossil energy and the deterioration of the environment, people urgently need to find a new type of clean energy as a substitute for fossil fuels. However, hydrogen energy has attracted people's attention because of its absolutely non-polluting combustion characteristics, so various hydrogen production processes have emerged. Generally, hydrogen production processes or resources are wasted seriously, or the low hydrogen production rate can not be popularized on a large scale. The supercritical water gasification process has the advantages of quick reaction, high gasification rate and clean process. As a new type of hydrogen production technology, it is an environment-friendly and resource-efficient hydrogen production technology. Hydrogen production from supercritical water gasification has a good development prospect. Based on the latest research results of supercritical water hydrogen production in the world, this paper discusses the research status of supercritical water gasification hydrogen production technology of leachate. The main technical problems and possible solutions for hydrogen production from supercritical water gasification at this stage are pointed out. In this paper the gasification of hydrogen production in supercritical water is carried out with the landfill leachate as the research object. The effects of reaction temperature, pressure and residence time on the reaction results were discussed in detail. The effects of different reaction conditions on the volume components and yields of hydrogen, methane and carbon dioxide in gaseous products were investigated in order to produce hydrogen. The effect of COD and TOC removal efficiency of leachate was analyzed qualitatively and quantitatively by gas-mass spectrometry. The chemical reaction mechanism of supercritical water gasification for hydrogen production from leachate was preliminarily discussed, and the method of combining single factor analysis with orthogonal test was adopted. The optimum reaction conditions for gasification of leachate in supercritical water to produce hydrogen gas are obtained as follows: temperature 450 鈩，

本文編號：1359986